blob: b110fc89e468f41d873acc4048d4858ccc980911 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CC_PAINT_TIME_COUNTER_H_
#define CC_PAINT_TIME_COUNTER_H_
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "base/time.h"
#include "cc/ring_buffer.h"
namespace cc {
// Maintains a history of paint times for each frame
class PaintTimeCounter {
public:
static scoped_ptr<PaintTimeCounter> create();
size_t HistorySize() const { return ring_buffer_.BufferSize(); }
struct Entry {
Entry()
: commit_number(0) { }
int commit_number;
base::TimeDelta paint_time;
base::TimeDelta rasterize_time;
base::TimeDelta total_time() const {
return paint_time + rasterize_time;
}
};
// n = 0 returns the oldest and
// n = PaintTimeHistorySize() - 1 the most recent paint time.
base::TimeDelta GetPaintTimeOfRecentFrame(const size_t& n) const;
void SavePaintTime(const base::TimeDelta& total_paint_time,
int commit_number);
void SaveRasterizeTime(const base::TimeDelta& total_rasterize_time,
int commit_number);
void GetMinAndMaxPaintTime(base::TimeDelta* min, base::TimeDelta* max) const;
void ClearHistory();
private:
PaintTimeCounter();
RingBuffer<Entry, 90> ring_buffer_;
base::TimeDelta last_total_paint_time_;
base::TimeDelta last_total_rasterize_time_;
bool can_save_paint_time_delta_;
bool can_save_rasterize_time_delta_;
DISALLOW_COPY_AND_ASSIGN(PaintTimeCounter);
};
} // namespace cc
#endif // CC_PAINT_TIME_COUNTER_H_
|
